Marble Plate of Summoning Cold Elementals

Marble Plate of Summoning Cold Elementals: This device is a circular plate of marble about 9 inches in diameter and about ¾ of an inch thick. To activate this device, it must be placed level on a solid, stable surface and a full skin of fresh water must be poured upon it; as the water touches the base it magically freezes into a small sculpture of a cold elemental. The command words inscribed around the rim of the plate must then be spoken, which requires a full round to complete.